Sippy cap for a bottle opening



FIG. 1 is a perspective view of the sippy cap for a bottle opening of the instant invention;

FIG. 2 is a left side elevation view thereof, the right side elevation view being identical thereto;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a top elevation view thereof, the bottom elevation view being identical thereto.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a sippy cap for a bottle opening, as shown and described. 